(CNN) -- The Kroger Co. is recalling select pet food packages from stores in 19 states fearing some of these products may contain aflatoxin, a toxic chemical byproduct that could be harmful to animals.

The Kroger Co. urged customers to immediately consult with their veterinarian if their animals show any signs of sluggishness or lethargy combined with a reluctance to eat. A yellowish tint to the eyes or gums, severe blood or diarrhea are also warning signs, the company said.

According to the Center for Disease Control (CDC), Aflatoxin is a fungal toxin that contaminates maize and other types of crops during production, harvest storage or processing.

The company has set up a Customer Recall Notification system to help customers determine whether they have purchased any of the contaminated products. Most of recalled products have an expiration date of October 23 and 24, 2011.

States with Kroger-operated stores included in the recall are Alabama, Arkansas, Georgia, Illinois, Indiana, Kansas, Kentucky, Louisiana, Michigan, Mississippi, Missouri, Nebraska, North Carolina, Ohio, South Carolina, Tennessee, Texas, Virginia and West Virginia.